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Finding the Fourth Proportional to 1,242.12, 1,714.51 and 800.02

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Solution

The fourth proportional to 1,242.12, 1,714.51 and 800.02 is: 1,104.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.12 : 1,714.51 = 800.02 : x
  2. Step 2: Convert to fraction form
    1,242.12/1,714.51 = 800.02/x
  3. Step 3: Cross multiply
    1,242.12x = 1,714.51 × 800.02
  4. Step 4: Simplify right side
    1,242.12x = 1,371,633.72
  5. Step 5: Solve for x
    x = 1,371,633.72/1,242.12
  6. Step 6: Final answer
    x = 1,104.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.